Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 867 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
2. 2.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
5. 5.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
6. 6.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
7. 7.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a stopwatch (d) a string
11. 11.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) yeast
14. 14.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a string (d) a mirror
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) the same hook (d) how far we pull it back
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a magnet
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a battery cell (d) a ruler
22. 22.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
23. 23.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a mirror (d) a pencil and tape
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) the weight of the bob (d) how far we pull it back
26. 26.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a heavy nut or washer (d) a ruler
29. 29.True or false: a mirror is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a stopwatch
32. 32.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
34. 34.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a ruler (d) a mirror
40. 40.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids